First flight after maintenance goes awry

Probable cause: The failure of the pilot, who was not a certified mechanic, to tighten the B-nut on a remotely mounted oil filter line, which resulted in oil exhaustion, a total loss of oil pressure, and a subsequent total loss of engine power.

First solo in Stinson 108 goes awry

Probable cause: The pilot’s failure to maintain directional control during the landing roll. Contributing to the accident was the pilot’s failure to obtain appropriate training in the airplane before flying solo.